Actor Shia LaBeouf is at it again – opening a bizarre art installation in Los Angeles just days after wearing a paper bag to the premiere of his latest film.

Visitors to the #IAmSorry installation are led into a tiny room where the Nymphomaniac star sits with the "I am not famous anymore" bag on his head.

Before entering they are invited by a woman sitting behind a table to take possession of one of several "implements".

Some of these objects relate to LaBeouf's previous films, such as a whip from Indiana Jones and the Temple of the Crystal Skull and several Transformers toys.

A pair of pliers, a bottle of Brut aftershave, a bottle of Jack Daniel's and a bowl of folded notes with Twitter comments about LaBeouf were also available for choosing.

Visitor Maycie Thornton said she took a flower out of a vase before going through a dark curtain to an area where the actor was sitting at a table.

"There was, it was kind of wet under, it looked like he had been crying and his eyes were like so sad, so I just immediately got so awkward, because you're like trying to talk to someone who is not talking back to you, in this room by yourself," she said.

Labeouf's strange behaviour began after plagarism accusations in December

All this follows the 27-year-old's bizarre behaviour at the Berlin Film Festival, where he walked down the red carpet with his head covered.

Earlier he had stormed out of a news conference where he was asked how it felt to perform sexual scenes in Nymphomaniac.

Video:LaBeouf's Odd Behaviour In Berlin

LaBeouf quoted ex-footballer Eric Cantona when he told the assembled journalists they were like "seagulls following the trawler to get sardines".

LaBeouf tweeted "I am not famous anymore" every day between January 13 and February 9 but on Tuesday the only words on his official account were "#IAmSorry".

A press release about his performance art installation reads: "Shia LaBeouf is sorry. Sincerely sorry. He will be in situ at 7354 Beverly Boulevard for the duration. Implements will be provided. Free admission."

LaBeouf's oddball antics stem from revelations in December that his short film Howard Cantour.com plagiarised a novel by Daniel Clowes.